JP2005044483A - Magnetic recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic recording/reproducing device for recording/reproducing data in/from two kinds of tape cassettes different from each other in tape width and reel interval. <P>SOLUTION: A supply side reel base 11a and a winding side reel base 11b are fixed to swing by a common spindle 13. By operating a moving mechanism 90, a reel interval between two reel bases 11a and 11b is switched between the state of the reel interval of an 8mm cassette 2 and the state of the reel interval of a DDS cassette 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a magnetic recording / reproducing apparatus that records or reproduces data on two types of tape cassettes having different tape widths and reel intervals.

  One of data storage devices for backing up computer data is the DDS format. The DDS format uses a DAT (digital audio tape) cassette having a tape width of 3.8 mm. In recent years, the amount of information in computer data has increased dramatically. In order to record more information on a magnetic tape (hereinafter simply referred to as a tape) in a tape cassette, it is necessary to increase the recording density of the tape. However, if the amount of information increases dramatically, there is a limit to cope with the increase in the amount of information by increasing the recording density of the tape.

  For example, conventional magnetic recording / reproducing apparatuses use the same width tape as seen in the DVC standard cassette, but there are several types of cassettes with different tape winding capacities by changing the distance between the reels. It is prepared. These are standardized cassettes, assuming a recording / reproducing apparatus in which a plurality of capacities of tape cassettes are mounted from the recording format standard stage.

Further, a reel base that moves linearly with respect to the difference in distance between reels has been proposed. Further, although a recording / reproducing apparatus corresponding to tape cassettes having different tape widths has been proposed, this is loading based on the lower end of the tape.
JP-A-7-57422

  Even in the DDS format, since a tape cassette having a narrow tape width is used, it has become difficult to record computer data having an enormous amount of information. Therefore, in order to record a huge amount of information data, there is no solution other than using a data storage device of another format using a tape cassette having a wide tape width.

  However, an existing data storage apparatus using a tape cassette having a tape width wider than that of the DDS format cannot naturally reproduce a tape cassette having a narrow tape width of the DDS format. Accordingly, a user using a DDS format data storage device continues to own a DDS format data storage device to reproduce past data, and records data with an enormous amount of information in recent years. You must own a data storage device of another format that uses a wide tape cassette. Such a thing is not preferable for the user, and the solution has been eagerly desired.

  For example, when trying to implement a recording and playback device with a tape cassette with different tape width and cassette case thickness, the tape height when loading the tape must match either the top or bottom of the tape. There is.

  When the lower ends of the tapes are aligned, the problem of reel stand height does not occur, but difficulties arise in terms of tape loading. It is required for stable running of the tape that the fixed side drum of the rotating head drum is lead-processed to support the lower end of the tape, and that the upper end of the tape is regulated at the inlet and outlet of the head drum. A dedicated guide roller is selected according to the width and loaded to the inlet / outlet of the head drum. When the tape cassette is mounted, the wide guide roller does not fit in the mouse of the tape cassette having a small width, and therefore it is necessary to move it from the mouse at the time of mounting, and the loading mechanism is extremely difficult.

  On the other hand, when the upper end of the tape is aligned, the above-mentioned problem can be avoided. Instead, it is necessary to increase the height of the lead where the narrow tape is wound around the head drum. Can be solved. The other is that when the tape cassette is installed, the height of the reel flange is different. The small cassette has a higher center of the reel hub than the large cassette. It will dive deep into the hub structure, making it impossible for the hub structure. The other is that the height of the drive claw of the reel base is increased according to the small cassette, which means that when the large cassette is mounted via the cassette housing, it is inserted from the higher position. In addition, there is a problem that the height of the entire apparatus including the cassette housing becomes thick.

  The present invention has been made in view of such problems, and it is possible to suppress the height of the entire apparatus by increasing the height of the reel driving claw according to the small cassette and decreasing it according to the large cassette. An object of the present invention is to provide a magnetic recording / reproducing apparatus capable of performing the above.

  The present invention solves the above-mentioned problems of the prior art, and the invention according to claim 1 relates to a first magnetic tape having a first tape width and a first supply reel and a first winding. A first tape cassette which is stretched between the first reel and the first supply reel and the first take-up reel form a first reel interval, and wider than the first tape width A second magnetic tape having a second tape width is stretched between a second supply reel and a second take-up reel, and the second supply reel and the second take-up reel are In a magnetic recording / reproducing apparatus that selectively uses a second tape cassette having a second reel interval wider than the first reel interval, a supply-side reel base for driving the first or second supply reel, and No take-up reel table for driving the first or second take-up reel The flat reel motor includes a stator substrate integrated with a flat reel motor stator and a reel base body integrated with a flat reel motor rotor. The reel shaft can move up and down in the hollow portion of the stator substrate and the reel base body, and is lifted or lowered by the operating member, so that the height corresponding to the supply reel or take-up reel of the first tape cassette, The magnetic recording / reproducing apparatus is configured to be able to selectively switch the height corresponding to the supply reel or take-up reel of the second tape cassette.

  According to a second aspect of the present invention, in the first aspect of the invention, the upper end of the tape width of the magnetic tape in the first tape cassette and the upper end of the tape width of the magnetic tape in the second tape cassette are the same height. Thus, the magnetic recording / reproducing apparatus sets the ascending position or the descending position of the reel shaft by the operating member.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a rotating drum for winding the first magnetic tape or the second magnetic tape at a predetermined angle, and the first magnetic tape as the rotating drum. Loading the first magnetic tape or the second magnetic tape so that the second magnetic tape is wound at a first angle with respect to the first magnetic tape and the second magnetic tape is wound at a second angle greater than the first angle. Means, reproducing means for reproducing data recorded in the first format on the first magnetic tape, recording data in the second format on the second magnetic tape, and the second A magnetic recording / reproducing apparatus comprising recording / reproducing means for reproducing data recorded on the magnetic tape in the second format.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the distance from the lower end portion on the outer peripheral surface of the rotary drum is set to the outer peripheral portion. A fixed drum having a lead formed in a curved shape so as to vary according to a position in the direction; and the lead regulates a position of a lower end of each of the first magnetic tape and the second magnetic tape. And a lead shift mechanism for rotating the fixed drum by a predetermined angle in the circumferential direction according to whether the tape cassette is used or the second tape cassette is used.

  A fifth aspect of the present invention is the magnetic recording / reproducing apparatus according to the third or fourth aspect, wherein the first format is a DDS format.

  In the magnetic recording / reproducing apparatus of the present invention, a first magnetic tape having a first tape width is stretched between a first supply reel and a first take-up reel, and the first supply reel and the A first tape cassette having a first reel interval between the first take-up reel and a second magnetic tape having a second tape width wider than the first tape width is supplied to a second supply reel. And a second take-up reel, and the second supply reel and the second take-up reel form a second reel interval that is wider than the first reel interval. In a magnetic recording / reproducing apparatus that selectively uses a tape cassette, a supply-side reel stand that drives the first or second supply reel, and a take-up reel stand that drives the first or second take-up reel Are both integrated with the stator of the flat reel motor. The reel shaft of the flat type reel motor, which has a reel base body integrated with the rotor of the flat type reel motor and a reel drive claw attached to the upper end, Can be moved up and down, and raised or lowered by the operating member, so that the height corresponding to the supply reel or take-up reel of the first tape cassette and the supply reel or take-up reel of the second tape cassette Since the corresponding height can be selectively switched, the height of the reel driving claw is increased according to the first tape cassette (small cassette) and is decreased according to the second tape cassette (large cassette). Therefore, the height of the entire apparatus can be suppressed.

  In addition, since the data can be recorded / reproduced to / from the second tape cassette while maintaining compatible reproduction of the first tape cassette, the user only needs to own one device to store the data on the first tape cassette. The recorded past data can be reproduced, and computer data having an enormous amount of information in recent years can be recorded.

  Specifically, for example, DDS format tape cassettes using 3.8 mm width tape can be played back, but data is recorded and played back on newer format tape cassettes using 8 mm width tape. A possible device is realized. This means that the format can be smoothly transferred without preparing or maintaining a device in each of the existing format and the new format having a large capacity.

  The outline of the magnetic recording / reproducing apparatus of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are plan views showing an embodiment of the magnetic recording / reproducing apparatus of the present invention, FIG. 3 is a flowchart for explaining the operation of the magnetic recording / reproducing apparatus of the present invention, and FIGS. 4 and 5 are diagrams of the present invention. FIG. 6 is a plan view showing a reel stage moving mechanism used in the magnetic recording / reproducing apparatus, FIG. 6 is a diagram showing an example of a winding angle of a tape around a rotating drum in the magnetic recording / reproducing apparatus of the present invention, and FIG. 7 is a magnetic recording / reproducing apparatus of the present invention. FIG. 8 is a view for explaining the operation of the read shift mechanism, FIG. 9 is a plan view showing the relationship between the rotating drum and the tape in the magnetic recording / reproducing apparatus of the present invention, and FIG. 10 is a diagram for explaining the recording format of the tape, FIG. 11 is a circuit diagram showing an example of a recording / reproducing circuit used in the magnetic recording / reproducing apparatus of the present invention, and FIG. 12 is a rotating drum in the magnetic recording / reproducing apparatus of the present invention. Diagram showing an example of a head arrangement, 13 and 14 are plan views illustrating an example of two types of tape cassettes for use in magnetic recording and reproducing apparatus of the present invention.

  First, a tape cassette used in the magnetic recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 13 shows a tape cassette 1 having a tape width of 3.8 mm and used in the DDS format. 13A is a plan view of the tape cassette 1 viewed from the cassette mouse 1m side, and FIG. 13B is a plan view of the tape cassette 1 viewed from the surface. Between the supply reel 1a and the take-up reel 1b of the tape cassette 1, a magnetic tape (hereinafter simply referred to as tape) 1t having a tape width of 3.8 mm is stretched. Hereinafter, the tape cassette 1 which is a tape cassette used in the DDS format is referred to as a narrow tape cassette 1.

  On the other hand, FIG. 14 shows an example of a tape cassette having a tape width wider than that of the tape cassette 1, and in this embodiment, a tape cassette 2 having a tape width of 8 mm is shown as an example. FIG. 14A is a plan view of the tape cassette 2 viewed from the cassette mouse 2m side, and FIG. 14B is a plan view of the tape cassette 2 viewed from the surface. A magnetic tape (hereinafter simply referred to as tape) 2t having a tape width of 8 mm is stretched between the supply reel 2a and the take-up reel 2b of the tape cassette 2. Hereinafter, the tape cassette 2 which is a tape cassette used as a new format in this embodiment is referred to as a wide tape cassette 2.

  In the present embodiment, a magnetic recording / reproducing apparatus (data storage apparatus) configured to ensure compatible reproduction of a narrow tape cassette 1 of DDS format and to record / reproduce data in a new format with respect to the wide tape cassette 2. ). Hereinafter, a specific configuration and operation will be described.

  In FIG. 3, in step S1, a tray (not shown) on which the narrow tape cassette 1 or the wide tape cassette 2 is placed is pulled out from the apparatus in accordance with a tray drawing command. In step S2, the narrow tape cassette 1 or the wide tape cassette 2 is placed on the tray, and in step S3, the tray is pulled into the apparatus. Then, in step S4, it is detected by a sensor (not shown) whether the loaded cassette is the narrow tape cassette 1 or the wide tape cassette 2. All the operations from the above steps S1 to S4 can be realized by a known technique.

  If it is detected in step S4 that the loaded cassette is the wide tape cassette 2, the process proceeds to step S11. If it is detected in step S4 that the loaded cassette is the narrow tape cassette 1, the process proceeds to step S21. In the present embodiment, the operation of the components of the magnetic recording / reproducing apparatus differs depending on whether the placed cassette is the narrow tape cassette 1 or the wide tape cassette 2.

  First, the operation when the loaded cassette is the wide tape cassette 2 will be described in detail. FIG. 1 shows a state where a wide tape cassette 2 is loaded in the magnetic recording / reproducing apparatus of this embodiment. The wide tape cassette 2 moves from the lower direction to the upper direction in FIG. 1 while being separated from the main deck 10 in the height direction. When the wide tape cassette 2 reaches the position shown in FIG. And the wide tape cassette 2 is mounted inside the apparatus (step S11 in FIG. 3).

  In FIG. 1, on a main deck 10, a supply reel base 11a and a take-up reel base for driving the supply reels 1a and 2a and the take-up reels 1b and 2b of the narrow tape cassette 1 and the wide tape cassette 2 are shown. 11b is provided. The center-to-center distance between the supply reel base 11a and the take-up reel base 11b is the same as the center distance between the supply reel 2a and the take-up reel 2b in the initial state (normal state) shown in FIG. Yes. Therefore, when the wide tape cassette 2 is mounted inside the apparatus, the supply reel base 11a and the take-up reel base 11b engage with the supply reel 2a and the take-up reel 2b, respectively.

  As will be described in detail later, the supply side reel base 11a and the take-up side reel base 11b are provided on the reel bases 12a and 12b. Although not shown here, the reel bases 12 a and 12 b are provided on the sub deck 50 (see FIGS. 4 and 5), and the sub deck 50 is mounted on the main deck 10. The reel bases 12a and 12b are connected around a fulcrum 13, and the reel bases 12a and 12b are configured to open and close around the fulcrum. Thereby, the position of the supply side reel stand 11a and the winding side reel stand 11b is freely displaceable.

  Further, on the main deck 10, the tapes 1 t and 2 t of the narrow tape cassette 1 or the wide tape cassette 2 are pulled out to the outside of the narrow tape cassette 1 and the wide tape cassette 2 to the rotating drum 30 at a predetermined angle. A plurality of guide rollers 21 to 26 and one pinch roller 27 are provided as winding means for winding. The guide rollers 21 and 26 are provided at the leading ends of the guide roller arms 21A and 26A. The two guide rollers 21 and 26 are dedicated guide rollers for loading the narrow tape cassette 1. Accordingly, the guide roller arms 21A and 26A are in the initial position in the state where the wide tape cassette 2 shown in FIG. 1 is loaded, and the tape 2t is not pulled out.

  The guide roller 24 on the take-up reel 2b side moves from the cassette mouse 2m of the wide tape cassette 2 to the outlet side of the rotary drum 30 along a groove (not shown) (step S12 in FIG. 3), and the supply reel The guide rollers 22 and 23 on the 2a side also move from the inside of the cassette mouse 2m to the inlet side of the rotary drum 30 along a groove (not shown) (step S13 in FIG. 3). Then, the guide roller 25 and the pinch roller 27 are pulled out from the inside of the cassette mouse 2m along a groove (not shown), and the pinch roller 27 is pressure-bonded to the capstan 41 (step S14 in FIG. 3). In addition, the broken line which connects step S12 and step S14 in FIG. 3 has shown that both are interlocking | mechanistically.

  By the above loading operation, the guide rollers 22 to 25 and the pinch roller 27 moved from the inside of the cassette mouse 2 m to the outside, the fixed guide rollers 42, 43 and 48 and the guide pins 44 to 47 provided on the main deck 10. Thus, a traveling path of the tape 2t is formed. At this time, the tape 2t is wound around the rotary drum 30 at an angle of about 180 ° as shown in FIG. 6B.

  Further, the position of the upper end portion (one end portion in the width direction) of the tape 2t is regulated by the upper flanges of the guide rollers 23 and 24 positioned on the inlet side and the outlet side of the rotary drum 30, and the lower end portion of the tape 2t. As shown in FIG. 8B, the position of (the other end portion in the width direction) is regulated by a lead 31 b 1 that is a stepped portion formed in the fixed drum 31 connected to the rotating drum 30. Details of the fixed drum 31 and the lead 31b1 will be described later.

  Next, the operation when the placed cassette is the narrow tape cassette 1 will be described in detail. FIG. 2 shows a state in which the narrow tape cassette 1 is loaded in the magnetic recording / reproducing apparatus of this embodiment. As apparent from FIGS. 13 and 14, the interval between the supply reel 1a and the take-up reel 1b of the narrow tape cassette 1 is narrower than the interval between the supply reel 2a and the take-up reel 2b of the wide tape cassette 2. Therefore, when the narrow tape cassette 1 is loaded, the interval between the supply reel base 11a and the take-up reel base 11b is set to the interval between the supply reel 1a and the take-up reel 1b of the narrow tape cassette 1. It is necessary to change it together.

  As shown in FIG. 3, when it is detected that the loaded cassette is the narrow tape cassette 1, in step S21, the supply-side reel base 11a and the take-up reel base 11b move to supply the supply-side reel. The interval between the table 11a and the take-up reel table 11b is switched.

  The moving mechanism 90 of the supply side reel base 11a and the take-up side reel base 11b will be described with reference to FIGS. FIG. 4 shows an initial position of the supply side reel base 11a and the take-up side reel base 11b, that is, a state where the wide tape cassette 2 is used. As shown in FIG. 4, the supply reel base 11a and the take-up reel base 11b are provided on the reel bases 12a and 12b. The reel bases 12 a and 12 b are connected at a fulcrum 13 and attached to the sub deck 50.

  A force is applied to the reel bases 12a and 12b in a closing direction by a tension spring 14. The reel bases 12a and 12b are provided with brakes 16a and 16b that are crimped or separated from the supply side reel base 11a and the take-up side reel base 11b by electromagnetic solenoids 15a and 15b. The supply-side reel base 11a, the take-up side reel base 11b, and the electromagnetic solenoids 15a and 15b are connected to and driven by a drive circuit provided on the back surface of the sub-deck 50 through a flexible substrate (not shown), for example.

  Here, for ease of understanding, the planes are separated from each other for illustration. However, the pins 17a and 17b of the reel bases 12a and 12b are provided with holes 18a1 and 18b1 of the arms 18a and 18b attached to the crimping lever 18, respectively. Are engaged. The arms 18a and 18b are openable and closable around a fulcrum 18c. The pin 18d of the crimping lever 18 is pressed against one end surface 19a of the slide cam 19 by the force of the spring 18e. A concave portion 19 a 1 is formed on the end surface 19 a of the slide cam 19.

  Now, when it is detected that the placed cassette is the narrow tape cassette 1, a movement command for the supply side reel base 11a and the take-up side reel base 11b is issued by a control means (not shown). Then, the slide cam 19 in the position shown in FIG. 4 slides to the left in the figure, and reaches the position shown in FIG. At this time, the pin 18d of the crimp lever 18 moves to the recess 19a1 formed in the end surface 19a. Then, the pressing force to the slide cam 19 by the spring 18e of the crimping lever 18 is released, and the angle of the reel bases 12a and 12b is reduced by the force of the tension spring 14. Accordingly, the angles of the V-shaped arms 18a and 18b opposite to the reel bases 12a and 12b are also reduced, and the fulcrum 18c of the arms 18a and 18b is pushed upward in the drawing.

  As the slide cam 19 slides in this manner, the reel bases 12a and 12b rotate in a direction to reduce the mutual angle, and the positions of the supply side reel base 11a and the take-up side reel base 11b move. To do. In the state shown in FIG. 5, the center-to-center distance between the supply-side reel base 11a and the take-up-side reel base 11b is the same as the center-to-center distance between the supply reel 1a and the take-up reel 1b of the narrow tape cassette 1. The side reel table 11a and the take-up side reel table 11b are positioned so as to be engaged with the supply reel 1a and the take-up reel 1b.

  As described above, when the supply-side reel base 11a and the take-up reel base 11b are moved in step S21 in FIG. 3, the narrow tape cassette 1 is separated from the main deck 10 in the height direction. 2. When the narrow tape cassette 1 moves from the lower direction to the upper direction in FIG. 2 and reaches the position shown in FIG. 2, the narrow tape cassette 1 is lowered toward the main deck 10 and the narrow tape cassette 1 is mounted inside the apparatus. (Step S22 in FIG. 3). With the narrow tape cassette 1 mounted in the apparatus, the supply reel base 11a and the take-up reel base 11b engage with the supply reel 1a and the take-up reel 12b, respectively.

  When the narrow tape cassette 1 is mounted inside the apparatus, the above-described guide roller arms 21A and 26A rotate, and the guide rollers 21 and 26 pull out the tape 1t of the narrow tape cassette 1 to the outside by a predetermined amount (see FIG. 3 step S23). The guide roller arms 21A and 26A are respectively engaged with the grooves 19b and 19c of the slide cam 19 shown in FIGS. 4 and 5, and as the slide cam 19 shifts from the state of FIG. 4 to the state of FIG. To rotate.

  When the narrow tape cassette 1 is mounted inside the apparatus, the lead shift mechanism 60 (see FIG. 7) provided on the fixed drum 31 is operated in parallel with the operations of steps S21 to S23 of FIG. (Step S31). The lead shift mechanism 60 will be described in detail later. The read shift mechanism 60 completes its operation before the loading of the tape 1t of the narrow tape cassette 1 is completed.

  Next, the guide roller 24 on the take-up reel 2b side moves from the cassette mouse 1m of the narrow tape cassette 1 to the outlet side of the rotary drum 30 along a groove (not shown) (step S24 in FIG. 3). To do. When the narrow tape cassette 1 is loaded, the guide rollers 22 and 23 on the supply reel 1a side do not operate and the tape 1t is not pulled out as shown in FIG. That is, the guide rollers 22 and 23 are dedicated guide rollers for loading the wide tape cassette 2.

  Then, the guide roller 25 and the pinch roller 27 are pulled out from the inside of the cassette mouse 1m along a groove (not shown), and the pinch roller 27 is pressure-bonded to the capstan 41 (step S25 in FIG. 3). Note that step S21 and step S23, and step S24 and step S25 in FIG. 3 are mechanically linked.

  By the above loading operation, the guide rollers 21, 24 to 26 and the pinch roller 27 moved from the inside of the cassette mouse 1m to the outside, and the fixed guide rollers 42 and 48 and the guide pins 45 to 47 provided on the main deck 10 are provided. Thus, a running path of the tape 1t is formed. At this time, the tape 1t is wound around the rotary drum 30 at an angle of about 68 ° as shown in FIG.

  Further, the position restriction of the upper end portion (one end portion in the width direction) of the tape 1 t is performed by the upper flanges of the guide rollers 21 and 24 located on the inlet side and the outlet side of the rotary drum 30. Since the height position of the upper flange of the guide roller 21 is set to be the same as the height position of the upper flange of the guide roller 22, the upper end portion of the tape 1t is the same height position as the upper end portion of the tape 2t. is there. As shown in FIG. 8A, the position restriction of the lower end portion (the other end portion in the width direction) of the tape 1t is performed by a lead 31b1 which is a step portion formed in the fixed drum 31 connected to the rotating drum 30. .

  Here, a lead shift mechanism 60 that switches the position of the lower ends of the tapes 1t and 2t by rotating the leads 31b1 of the fixed drum 31 in the circumferential direction will be described with reference to FIGS. The lead shift mechanism 60 has a position where the lead 31b1 regulates the lower end of the tape 1t according to the case where the narrow tape cassette 1 is loaded and the case where the wide tape cassette 2 is loaded, and the lead 31b1 is the tape 2t. The fixed drum 31 is rotated between a position where the lower end of the head is regulated.

  7A is a plan view of the rotating drum 30 and its accessory parts and the lead shift mechanism 60 as viewed from above, FIG. 7B is a side view thereof, and FIG. 7C is an enlarged sectional view. As shown in FIGS. 7A to 7C, the drum base 32 is mounted with a geared motor 33, an encoder gear 34, and a crimp gear 35. The rotational driving force of the geared motor 33 is transmitted to the fixed drum 31 through the encoder gear 34, the pressure-bonding gear 35, and the timing belt 36, and the fixed drum 31 is rotated by a predetermined angle. The geared motor 33, the encoder gear 34, the pressure gear 35, and the timing belt 36 constitute a lead shift mechanism 60.

  As shown in FIG. 7C, the fixed drum 31 includes a bottom surface portion 31a that supports a fixed shaft 30a that is a rotation shaft of the rotary drum 30, and an outer peripheral portion 31b. In a general fixed drum, a bottom surface portion and an outer peripheral portion are integrated, but in this embodiment, the bottom surface portion 31a and the outer peripheral portion 31b are arranged so that the outer peripheral portion 31b of the fixed drum 31 can be rotated. Is a separate body. A ball bearing 31c is provided between the bottom surface portion 31a and the outer peripheral portion 31b. A ball bearing 30b is provided between the rotary drum 30 and the fixed shaft 30a. In FIG. 7C, 30c is a stator coil, 30d is a rotor magnet, 30e is a flyhole, and H is a magnetic head.

  As shown in FIG. 7B, a lead 31b1 is formed on the outer peripheral portion 31b of the fixed drum 31 in a curved shape so that the distance from the lower end portion on the outer peripheral surface of the rotating drum 30 varies according to the position in the circumferential direction. Is formed. The lead 31b1 circulates around the outer peripheral portion 31b. The rotational driving force of the geared motor 33 for rotating the fixed drum 31 (outer peripheral portion 31 b) by a predetermined angle is transmitted to the timing belt 36 via the encoder gear 34 and the pressure gear 35, and the timing belt 36 rotates the fixed drum 31. Move.

  As shown in FIG. 7C, a stopper pin 31d is attached to the outer peripheral portion 31b. The stopper pin 31d comes into contact with a predetermined position of the drum base 32, and the rotation of the outer peripheral portion 31b is stopped. After the rotation of the outer peripheral portion 31b stops, the crimp gear 35 tries to further rotate the outer peripheral portion 31b, so that the stopper pin 31d is pressed against the drum base 32 and the outer peripheral portion 31b is firmly positioned. Even when the outer peripheral portion 31b rotates in the reverse direction, the outer peripheral portion 31b is firmly positioned by the same configuration.

  Thus, by rotating the outer peripheral portion 31b of the fixed drum 31 between the first position and the second position, the position of the lead 31b1 formed on the outer peripheral portion 31b is shifted in the circumferential direction. The first position is the position when the narrow tape cassette 1 is loaded, and the second position is the position when the wide tape cassette 2 is loaded. As shown in FIG. 8A, in the first position, the lead 31b1 regulates the lower end portion of the tape 1t of the narrow tape cassette 1, and as shown in FIG. 8B, in the second position. The shape of the lead 31b1 and the position on the periphery are set so that the lead 31b1 regulates the position of the lower end of the tape 2t of the wide tape cassette 2.

  By the configuration and operation of the lead shift mechanism 60 described above, the lead 31b1 formed on the outer peripheral portion 31b of the fixed drum 31 is switched between the state shown in FIG. 8A and the state shown in FIG. 8B. When the tape 1t and the tape 2t of the narrow tape cassette 1 and the wide tape cassette 2 are loaded, the positions of the lower ends of the tape 1t and the tape 2t are regulated.

  FIG. 9 is a plan view showing the relationship between the rotary drum 30 and the tapes 1t and 2t in a state where the tapes 1t and 2t are loaded. FIGS. 10A and 10B show the recording formats of tape 1t and tape 2t, respectively. As shown in FIG. 10A, data is recorded on a portion of the recording width 2.6 mm indicated by hatching on the tape 1 t having a tape width of 3.8 mm. As shown in FIG. 10B, data is recorded on a portion of the recording width 6.8 mm shown by hatching on the tape 2t having a tape width of 8 mm.

  As described above and as shown in FIG. 9, the tape 1 t and the tape 2 t run on the rotary drum 30 with the positions of the upper ends thereof being aligned. The tape 2t is wound around the rotary drum 30 at an angle of about 180 °, and the effective winding angle θ2 is 175 °. The tape 1t is wound around the rotary drum 30 at an angle of approximately 68 °, and the effective winding angle θ1 is 67.5 °. The effective wrapping angle is a wrapping angle of a tape used for data recording or reproduction. α is a shift angle of the lead 31b1 by the lead shift mechanism 60, and is 107.5 °.

  A one-dot chain line having Tr1-A and Tr1-B as end points shown in FIG. 9 indicates a track Tr1 formed on the tape 1t of the narrow tape cassette 1 and scanned by the magnetic head H for data reproduction. The alternate long and short dash line with Tr2-A and Tr2-B shown in FIG. 9 is formed on the tape 2t by scanning the magnetic head H for data recording when the wide tape cassette 2 is used. A track Tr2 formed by 2t and scanned by the magnetic head H for data reproduction.

  As shown in FIG. 10A, the track Tr1 formed on the tape 1t of the narrow tape cassette 1 has a track pitch of 6.787 μm and a track running angle of 6.37492 °. The above is the DDS format of the narrow tape cassette 1. In the present invention, in order to realize this format, the drum diameter is 40 mm, the drum rotation speed is 7500 rpm, the drum effective winding angle is 67.5 °, and the tape speed is 15.287 mm / sec.

  On the other hand, as shown in FIG. 10B, the track Tr2 formed on the tape 2t of the wide tape cassette 2 has a track pitch of 3.0 μm and a track traveling angle of 6.29963 °. Other than this, the track length is 61.047 mm, the drum diameter is 40 mm, the drum rotation speed is 7500 rpm, the drum effective winding angle is 175.0 °, the tape speed is 6.835 mm / sec, and the above is the case where the wide tape cassette 2 is used. New format. The new format of the wide tape cassette 2 is merely an example and is not limited to the above.

  Next, a reproducing circuit for reproducing data recorded on the narrow tape cassette 1 and the wide tape cassette 2 and a recording circuit for recording data on the wide tape cassette 2 will be described with reference to FIG. 11A and 11B, HA1, HA2, HB1, and HB2 are magnetic heads provided on the rotary drum 30. FIG. 12 shows the head arrangement of the rotary drum 30. In FIG. 12, HA1 and HA2 are metal-in-gap heads (MIG heads), and these heads HA1 and HA2 are arranged to face each other at 180 ° on the circumference of the rotary drum 30. The heads HA1 and HA2 are used for recording / reproducing data of the narrow tape cassette 1 and for recording / reproducing data on the wide tape cassette 2.

  HB1 and HB2 are magnetoresistive heads (MR heads). The heads HB1 and HB2 face 180 ° on the circumference of the rotary drum 30 and are disposed at positions shifted by 90 ° from the heads HA1 and HA2. ing. The heads HB1 and HB2 are used only for reproducing data recorded on the wide tape cassette 2. The head H shown in FIG. 7C is one of the heads HA1, HA2 or the heads HB1, HB2, and the head H shown in FIG. 9 shows any one of the heads HA1, HA2, HB1, HB2.

  The above-described configuration of the magnetic head is an example, and recording and reproduction of the cassettes 1 and 2 may be performed by the heads HA1 and HA2.

  FIG. 11A shows a reproducing circuit for the narrow tape cassette 1 (DDS format) and a recording circuit for the wide tape cassette 2 (new format). The signals reproduced by the heads HA1 and HA2 are input to the pre-recording amplifier 73 via the rotary transformers 71 and 72 and supplied to a signal processing circuit (not shown). On the other hand, a signal to be recorded supplied from a signal processing circuit (not shown) is input to the rotary transformers 71 and 72 via the pre-recording amplifier 73, and is supplied from the rotary transformers 71 and 72 to the heads HA1 and HA2. . The rotary transformers 71 and 72 are mounted inside the rotary drum 30 and the fixed drum 31.

  FIG. 11B shows a reproducing circuit of the wide tape cassette 2 (new format). Since the heads HB1 and HB2 are MR heads, it is necessary to pass a constant current from an external power source to the reproduction circuit and detect a reproduction signal as a voltage change. Outputs from the heads HB1 and HB2 are supplied to an amplifier 75 via a switch 74. The switches 74 are alternately connected to the heads HB1 and HB2 and output as a one-channel serial signal. The constant current from the external power source is supplied to the amplifier 75 via the rotary transformer 78 and the diode element 76 for preventing a reverse current flow. The output of the amplifier 75 is supplied to the preamplifier 79 via the rotary transformer 77.

  With this configuration, the reproduction signal detected as a voltage change is input to the preamplifier 79 and supplied to a signal processing circuit (not shown). The rotary transformers 77 and 78 are mounted inside the rotary drum 30 and the fixed drum 31.

  As described above, in the present invention, it is possible to record / reproduce data in / from the wide tape cassette 2 in the new format while maintaining compatible reproduction of the narrow tape cassette 1 in the DDS format. In the configuration of this embodiment, since the configuration is simplified, the cost of the apparatus does not increase significantly. The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention.

  Although the outline of the magnetic recording / reproducing apparatus of the present invention has been described above, the main part of the magnetic recording / reproducing apparatus of the present invention will be described with reference to the accompanying drawings. 15 to 18 are perspective views of the entire cassette housing, FIG. 19 is a perspective view of the cassette holder, FIGS. 20 to 22 are views showing the tape cassette housing state of the cassette holder, and FIG. 23 is the tape holder of the cassette holder omitted. FIGS. 24 and 25 are views showing a state of the cassette housing when the tape cassette is inserted, and FIG. 26 is a view showing the drive mechanism.

  The basic structure such as the frame structure of the cassette housing 100 and the drive of the cassette holder 150 in the magnetic recording / reproducing apparatus of the present invention is the same as that of the cassette housing of VHS tape or 8 mm tape. In addition to such a basic structure, a sub front panel 120 is provided on the front surface of the cassette housing 100 in addition to the front panel 110, and parallel links 141 that support the sub front panel 120 are provided on the left and right sides of the cassette housing 100. It is provided.

  In the following description, the narrow tape cassette 1 is referred to as a DDS cassette 1 as a specific example thereof, and the wide tape cassette 2 is referred to as an 8 mm cassette 2 as a specific example thereof.

  15 to 18 are perspective views of the entire cassette housing 100. A front panel 110 is disposed on the front surface of the cassette housing 100, and a cassette insertion slot 111 having a size capable of inserting an 8 mm cassette 2 is provided on the front panel 110. FIG. The cassette insertion port 111 is provided with a door 112 that is flipped up to the back side.

  Inside the front panel 110, a sub front panel 120 is supported by the parallel link 141 of the drive mechanism 130 and is provided so as to be movable up and down. The sub front panel 120 is formed with a cassette insertion port 121 large enough to insert the DDS cassette 1. The cassette insertion port 121 is provided with a door 122 that is flipped up to the back side by a door opening / closing mechanism (not shown). ing.

  The sub front panel 120 has a use position at a height corresponding to the cassette insertion port 111 of the front panel 110 and a retreat position retracted downward from the cassette insertion port 111 by the drive mechanism 130 operating the parallel link 141. It can be moved up and down.

  As shown in FIG. 16, in the 8 mm cassette insertion mode, the sub-front panel 120 is in the lowered retracted position, and the door 112 of the cassette insertion slot 111 is closed. Therefore, as shown in FIG. From the cassette insertion port 111 of 110, the 8 mm cassette 2 can be inserted and discharged without any trouble.

  On the other hand, as shown in FIG. 18, in the DDS cassette insertion mode, the sub front panel 120 is in the raised use position. At this time, the door 112 of the cassette insertion slot 111 rides on the sub front panel 120 and opens. Yes. As shown in FIG. 17, the cassette insertion slot 121 of the sub-front panel 120 is positioned in the cassette insertion slot 111 of the front panel 110, so that the DDS cassette 1 can be inserted and ejected from the cassette insertion slot 121 without any trouble. It is like that.

  Switching between the DDS cassette insertion mode and the 8 mm cassette insertion mode is performed by operating a selection switch provided on the front panel 110. That is, when the DDS mode selection switch 125 is operated, the drive mechanism 130 operates the parallel link 141 to raise the sub front panel 120 and position it at the use position. On the other hand, when the 8 mm mode selection switch 115 is operated, the drive mechanism 130 operates the parallel link 141 to lower the sub front panel 120 and position it at the retracted position.

  As shown in FIG. 16, the sub front panel 120 moves up and down in parallel by the operation of the front arms 142 and 143 constituting the parallel links 141 on both the left and right sides. The front arms 142 and 143 are driven by a cam (not shown) of the front arm gear 144. Therefore, the use position and the retracted position of the sub front panel 120 are determined by the cam shape of the front arm gear 144. However, in order to increase the positioning accuracy of the sub front panel 120, the stop position of the front arm gear 144 is detected by a micro switch (not shown).

  A spring 145 is attached to the left and right front arms 142 so as to urge the front ends downward. The role of the spring 145 is to prevent the sub front panel 120 from rattling in the raised use position, and when a finger is inserted from the cassette insertion slot 111 of the front panel 110 while the sub front panel 120 is rising. This is a limiter to prevent injury.

  FIG. 19A is a perspective view of the cassette holder 150 as viewed obliquely from the front, and FIG. 19B is a perspective view of the cassette holder 150 as viewed from the oblique rear. The cassette holder 150 has a convex shape at the center and a concave shape on both the left and right sides. A cassette guide 160 for positioning the left and right sides of the DDS cassette 1 and a guide plate 170 for positioning the upper surface of the DDS cassette 1 are provided.

  Further, the cassette holder 150 is provided with a door sensor 180 and a connect arm 190 for rotating the guide plate 170 so as not to come into contact with the 8 mm cassette 2 when the 8 mm cassette 2 is inserted.

  FIG. 20A is a perspective view of the DDS cassette 1 in the DDS cassette insertion mode as seen obliquely from the front, FIG. 21B is a rear view, and FIG. 21A is the DDS cassette 1. FIG. 4B is a perspective view showing an open position of the door 112 of the front panel 110 in the DDS cassette insertion mode.

  22A is a perspective view showing the state in which the 8 mm cassette 2 is housed in the cassette holder 150 in the 8 mm cassette insertion mode together with the open position of the door 112 of the front panel 110, FIG. 22B is a rear view, and FIG. (A) is the perspective view which abbreviate | omitted 8 mm cassette 2 from FIG. 22 (A), The same figure (B) is a rear view.

  The cassette guide 160 is normally lifted by a spring 161, guides the left and right sides of the DDS cassette 1, and positions the DDS cassette 1 in accordance with the left and right centers of the cassette holder 150. When the DDS cassette 1 is inserted, even if the DDS cassette 1 is slightly shaken from side to side and hits the cassette guide 160, the force acts in the biting direction, so the cassette guide 160 does not escape downward. That is, the cassette guide 160 reliably performs positioning with the left and right guides when the DDS cassette 1 is inserted.

  Only when the 8 mm cassette 2 is inserted, the cassette guide 160 digs under the 8 mm cassette 2 as shown in FIG.

  The guide plate 170 is provided so as to be rotatable about 90 ° between an upright position shown in FIGS. 19 to 21 and a lateral position shown in FIGS. Since the guide plate 170 stands upright when the DDS cassette 1 is inserted, even if the DDS cassette 1 pushes the guide plate 170 backward or upward, it does not rotate. That is, the guide plate 170 in the upright position surely guides and positions the upper surface when the DDS cassette 1 is inserted.

  When the 8 mm cassette 2 is inserted, the guide plate 170 rotates about 90 ° and rides on the 8 mm cassette 2. That is, the guide plate 170 in the lateral position surely guides and positions the upper surface when the 8 mm cassette 2 is inserted.

  As shown in FIG. 21B, when the DDS cassette 1 is inserted, the sub front panel 120 is in the use position, and the door 112 of the cassette insertion slot 111 of the front panel 110 rides on the sub front panel 120 and opens. However, the opening amount (angle) of the door 112 at this time may be smaller than the opening amount (angle) of the door 112 when the 8 mm cassette 2 is inserted as shown in FIGS. 22 (A) and 23 (A). .

  The reason is that the DDS cassette 1 is considerably thinner than the 8 mm cassette 2, and when the DDS cassette 1 is housed in the cassette holder 150 as shown in FIGS. 20 (B) and 22 (B). Since the upper surface height is considerably lower than the upper surface height when the 8 mm cassette 2 is accommodated in the cassette holder 150, when the door 122 of the sub front panel 120 is opened, the door 112 of the front panel 110 is moved to the 8 mm cassette 2. This is because it does not have to be opened as much as when it is inserted.

  As shown in FIG. 22A, when the door 112 of the front panel 110 is opened when the 8 mm cassette 2 is inserted, the door 112 pushes up the door sensor 180 to rotate around the shaft 171. The amount of rotation of the door sensor 180 is enlarged by the connect arm 190 that meshes with the door sensor 180 by a gear, and the guide plate 170 is rotated by about 90 °.

  On the other hand, as shown in FIG. 21 (B), when the DDS cassette 1 is inserted, the door 112 of the front panel 110 is opened only to the height necessary for inserting the DDS cassette, and therefore does not come into contact with the door sensor 180. The guide plate 170 is kept in an upright position.

  FIG. 24A is a perspective view seen from an oblique front when the DDS cassette 1 is inserted in the 8 mm cassette insertion mode, FIG. 24B is a rear view, and FIG. 25A is the 8 mm cassette 2 in the 8 mm cassette insertion mode. The perspective view seen from diagonally forward when inserted, and the same figure (B) is a rear view.

  In the DDS cassette insertion mode, since the 8 mm cassette 2 is larger than the cassette insertion port 121 of the sub front panel 120, there is no fear of erroneous insertion, but the DDS cassette 1 may be erroneously inserted in the 8 mm cassette insertion mode. It is necessary to prevent such erroneous insertion.

  As shown in FIGS. 24A and 24B, stopper plates 210 are attached to shafts 201 extending in the front-rear direction and arranged on the left and right sides of the top frame 200 of the cassette housing 100. The stopper plate 210 is pulled downward by a spring 215 and is inclined downward with the shaft 201 as a rotation axis.

  When the DDS cassette 1 is inserted, the front edge of the stopper plate 210 has an oblique shape (a shape inclined downward in the direction toward the back in the insertion direction with respect to the horizontal direction perpendicular to the cassette insertion direction). The inclined portion 211 on the front edge gets on the DDS cassette 1 while rubbing against the DDS cassette 1, but the stopper plate 210 has a straight shape (a shape perpendicular to the insertion direction of the cassette) from the middle. Before reaching the predetermined position, the straight-shaped portion 212 is abutted to prevent erroneous insertion of the DDS cassette 1.

  On the other hand, since the 8 mm cassette 2 is thicker than the DDS cassette 1, the inclined portion 211 of the front edge of the stopper plate 210 ran over the 8 mm cassette 2 as shown in FIGS. When pushed up to a higher position than in the case of the DDS cassette 1. Therefore, the amount of contact between the straight portion 212 of the stopper plate 210 and the 8 mm cassette 2 is small. Moreover, the lid of the 8 mm cassette 2 is chamfered, and the hook between the straight shape portion 212 and the 8 mm cassette 2 when the inclined portion 211 of the front edge of the stopper plate 210 rides on the 8 mm cassette 2 is the lid of the 8 mm cassette 2. It is designed to be smaller than the chamfer. Therefore, the straight-shaped portion 212 of the stopper plate 210 does not hit the 8 mm cassette 2, and the 8 mm cassette 2 can be inserted to a predetermined position without any trouble.

  In the DDS cassette insertion mode, although not shown, since the front plate 142 lifts the stopper plate 210 upward when the sub front panel 120 is raised, the stopper plate 210 is horizontal, so the DDS cassette 1 Can be inserted without any problem.

  In this cassette housing 100, since the drive mechanism 130 (see FIG. 16) drives the cassette holder 150 and the sub front panel 120 by the same motor 131, a transmission switching mechanism is necessary.

  26A is a plan view of the drive mechanism 130 when driving the cassette holder 150, and FIG. 26B is a plan view of the drive mechanism 130 when driving the sub front panel 120. FIG. FIG. 4 is a side view of the drive mechanism 130.

  As shown in FIGS. 26A and 26C, when driving the cassette holder 150, the drive mechanism 130 uses a worm gear 132, a helical gear 133, a connect gear, and the drive force of the motor 131 mounted on the rotation shaft of the motor 131. 134, and is transmitted to the main gear 136 via the slide gear 135, and the main gear 136 operates a drive arm (not shown) to drive the cassette holder 150.

  The shaft of the connect gear 134 is a spline, and a slide gear 135 is slidably mounted on the spline shaft. A compression spring (not shown) is disposed between the slide gear 135 and the slit washer 137 at the tip of the spline shaft. Therefore, normally, the slide gear 135 is pushed by the compression spring and is at the position shown in FIG. Yes, meshing with the main gear 136.

  When the DDS mode selection switch 125 or the 8 mm mode selection switch 115 on the front panel 110 is operated, the sub-front panel 120 is moved so that the mechanical side first changes to the drive switching mode. The drive switching mode on the mechanical side is a mode in which the position is changed only by a control plate (part on the mechanical side) (not shown). When the control plate moves, the change lever 140 is moved from the position of FIG. 26 (A) to FIG. Move to the position.

  As shown in FIG. 26B, the drive is switched when the change lever 140 moves the slide gear 135 to a position where it engages with the front arm gear 144. That is, the driving mechanism 130 transmits the driving force of the motor 131 to the front arm gear 144 via the worm gear 132, the helical gear 133, the connect gear 134, and the slide gear 135, and the cam of the front arm gear 144 raises the sub front panel 120. Or lower. In FIG. 26B, the main gear 136 is not shown.

  When this operation is completed, the mechanical side switches from the drive switching mode to the cassette insertion mode, the control plate returns to the original position, and the slide gear 135 is pushed by the compression spring and meshes with the main gear 136.

  Hereinafter, an embodiment of the reel base will be described with reference to FIGS. 27 and 28. FIG. In addition, about the switching of the reel space | interval shown in FIG.4, FIG.5, it abbreviate | omits to show in figure the structure again as an Example. FIG. 27 is a cross-sectional view showing a mounted state of the 8 mm cassette 2, and FIG. 28 is a cross-sectional view showing a mounted state of the DDS cassette 1.

  The reel table 300 shown in FIGS. 27 and 28 is common to the supply side reel table and the take-up side reel table. The reel base 300 includes a stator substrate 310 pivotally attached to a mechanical substrate 340 by a support shaft 341. The stator substrate 310 is supplied by an operation of a moving mechanism (not shown in FIGS. 27 and 28). Switching between a state in which the reel interval between the side reel base (ie, reel base 300) and the take-up side reel base (ie, reel base 300) forms the reel interval of the 8 mm cassette 2 and the state where the reel interval of the DDS cassette 1 forms. (See FIGS. 4 and 5).

  The reel base 300 includes a stator substrate 310 integrated with a stator 311 of a flat reel motor 301 that directly drives a reel of a tape cassette, and a reel base body 320 integrated with a rotor 321 of the flat reel motor 301. Composed.

  On the stator substrate 310, a hollow shaft member 312 having a predetermined length is fixed in a through hole formed at the center of the stator 311. A hollow reel base body 320 is rotatably attached to the outer periphery of the hollow shaft member 312 via a ball bearing 313. A rotor 321 is fixed around the reel base body 320 so as to face the stator 311, and a spline is formed in the upper hollow portion 322 of the reel base body 320.

  In the hollow shaft member 312 of the stator substrate 310 and the hollow portion 322 of the reel base body 320, the reel shaft 331 of the flat type reel motor 301 is accommodated so as to be vertically movable. A reel holding member 332 is fixed to the upper end of the reel shaft 331. The reel holding member 332 is formed with a spline that fits with the spline of the hollow portion 322 of the reel base body 320. The reel holding member 332 serves as a stopper for the reel driving claw 333.

  A coil spring 335 is disposed between the reel holding member 332 and the reel base body 320, and the reel shaft 331 is urged upward by the spring force of the coil spring 335.

  A coil spring 315 is disposed between the slit washer 334 at the lower end of the reel shaft 331 and the hollow shaft member 312 of the stator substrate 310, and the reel shaft 331 is biased downward by the spring force of the coil spring 315. ing.

  The downward urging force by the coil spring 315 is set larger than the upward urging force by the coil spring 335.

  A lower surface of the mechanical substrate 340 is provided with a slide lever 342, a slide cam 345 that operates the slide lever 342 between a raised position and a lowered position, and a drive gear 346 that drives the slide cam 345.

  When the 8 mm cassette 2 is mounted, as shown in FIG. 27, the drive gear 346 drives the slide cam 345 to position the slide lever 342 at the lowered position. Then, the reel shaft 331 is positioned and held at the lower end position where the lower end of the reel holding member 332 contacts the reel base body 320 by the downward biasing force by the coil spring 315 that is larger than the upward biasing force by the coil spring 335. Therefore, at this time, the reel driving claw 333 is fitted so as to be submerged below the reel hub 2 h having a high height for the 8 mm cassette 2.

  On the other hand, when the DDS cassette 1 is mounted, as shown in FIG. 28, the drive gear 346 drives the slide cam 345 to position the slide lever 342 at the raised position. This raised position is determined by the positioning protrusion 343 of the slide lever 342 coming into contact with the lower surface of the mechanical substrate 340. When the slide lever 342 is positioned at the raised position, the coil spring 315 is compressed and the reel shaft 331 is positioned and held at the upper end position. Therefore, at this time, the reel driving claw 333 is fitted to the reel hub 1 h having a low height for the DDS cassette 1.

  Thus, when the 8 mm cassette 2 is mounted, the reel shaft 331 is positioned and held at the lower end position, while when the DDS cassette 1 is mounted, the reel shaft 331 is positioned and held at the upper end position. In addition, when the reel shaft 331 is positioned and held at the lower end position, the tape upper surface height (H) of the 8 mm cassette 2 fitted and attached to the reel drive claw 333 and the reel shaft 331 is positioned and held at the upper end position. When this is done, the lower end position and the upper end position of the reel shaft 331 are set so that the tape upper surface height (H) of the DDS cassette 1 fitted and mounted with the reel drive claw 333 is the same height. is there.

  As described above, when the cassette is transported from the outside and mounted at a predetermined position, the height H2 when the reel driving claw 333 is lowered should be exceeded, so that the height of the apparatus is kept low. be able to.

It is a top view which shows one Embodiment of this invention. It is a top view which shows one Embodiment of this invention. It is a flowchart for demonstrating operation | movement of this invention. It is a top view which shows the reel stand moving mechanism used by this invention. It is a top view which shows the reel stand moving mechanism used by this invention. It is a figure which shows an example of the winding angle | corner of the tape with respect to the rotating drum in this invention. It is a figure which shows the lead shift mechanism used by this invention. It is a figure for demonstrating the effect | action by a lead shift mechanism. It is a figure which shows the relationship between the rotating drum and tape in this invention planarly. It is a figure for demonstrating the recording format of a tape. It is a circuit diagram which shows an example of the recording / reproducing circuit used by this invention. It is a figure which shows an example of head arrangement | positioning of the rotating drum in this invention. It is a top view which shows the example of one type of tape cassette used by this invention. It is a top view which shows the example of another kind of tape cassette used by this invention. It is a perspective view of the whole cassette housing. It is a perspective view of the whole cassette housing. It is a perspective view of the whole cassette housing. It is a perspective view of the whole cassette housing. It is a perspective view of a cassette holder. It is a figure which shows the tape cassette accommodation state of a cassette holder. It is a figure which shows the tape cassette accommodation state of a cassette holder. It is a figure which shows the tape cassette accommodation state of a cassette holder. It is a figure which abbreviate | omits and shows the tape cassette of a cassette holder. It is a figure which shows the state at the time of tape cassette insertion of a cassette housing. It is a figure which shows the state at the time of tape cassette insertion of a cassette housing. It is a figure which shows a drive mechanism. It is sectional drawing which shows the Example of a reel stand. It is sectional drawing which shows the Example of a reel stand.

Explanation of symbols

1 narrow tape cassette 1t, 2t magnetic tape 1a, 2a supply reel 1b, 2b take-up reel 1m, 2m cassette mouse 2 wide tape cassette 11a supply-side reel base 11b take-up reel base 12a, 12b reel base 18 pressure lever 19 Slide cams 21 to 26 Guide rollers (loading means)
27 Pinch roller (loading means)
30 Rotating drum 31 Fixed drum 31a Bottom surface portion 31b Outer peripheral portion 31b1 Lead 60 Lead shift mechanism 71, 72, 77, 78 Rotary transformer 73 Prerecording amplifier 74 Switch 75 Amplifier 76 Diode element 79 Preamplifier 90 Reel base moving mechanism 100 Cassette housing 110 Front Panel 120 Sub-front panel 130 Drive mechanism 141 Parallel link 150 Cassette holder 160 Cassette guide 170 Guide plate 210 Stopper plate 300 Reel base 301 Flat type reel motor 310 Stator substrate 320 Reel base body 331 Reel shaft H, HA1, HA2, HB1, HB2 Magnetic head

Claims (5)

A first magnetic tape having a first tape width is stretched between a first supply reel and a first take-up reel, and the first supply reel and the first take-up reel are A first tape cassette having one reel interval, and a second magnetic tape having a second tape width wider than the first tape width between a second supply reel and a second take-up reel. A magnet that is stretched between and selectively uses a second tape cassette in which the second supply reel and the second take-up reel form a second reel interval wider than the first reel interval. In the recording / reproducing apparatus,
Both the supply-side reel stand that drives the first or second supply reel and the take-up reel stand that drives the first or second take-up reel are integrated with the stator of the flat reel motor. The stator board and the reel base body integrated with the rotor of the flat reel motor,
The reel shaft of the flat type reel motor having a reel drive claw attached to the upper end can move up and down in the hollow portion of the stator substrate and the reel base body, and is raised or lowered by the operating member, whereby the first tape cassette A magnetic recording / reproducing apparatus, wherein the height corresponding to the supply reel or take-up reel and the height corresponding to the supply reel or take-up reel of the second tape cassette can be selectively switched.   The reel shaft is raised or lowered by the actuating member so that the upper end of the tape width of the magnetic tape in the first tape cassette and the upper end of the tape width of the magnetic tape in the second tape cassette are the same height. The magnetic recording / reproducing apparatus according to claim 1, wherein A rotating drum that winds the first magnetic tape or the second magnetic tape at a predetermined angle;
The first magnetic tape or the first magnetic tape is wound around the rotating drum at a first angle and the second magnetic tape is wound at a second angle greater than the first angle. Loading means for loading the second magnetic tape;
Reproducing means for reproducing data recorded in the first format on the first magnetic tape;
And recording / reproducing means for recording data on the second magnetic tape in the second format and reproducing data recorded on the second magnetic tape in the second format. The magnetic recording / reproducing apparatus according to claim 1, wherein: A fixed drum that is connected to the rotating drum, and has a lead formed in a curved shape so that a distance from a lower end portion on an outer peripheral surface of the rotating drum varies according to a position in a circumferential direction on the outer peripheral portion;
Depending on whether the first tape cassette or the second tape cassette is used, the fixing is performed so that the lead regulates the lower end of each of the first magnetic tape and the second magnetic tape. 4. The magnetic recording / reproducing apparatus according to claim 1, further comprising a lead shift mechanism for rotating the drum by a predetermined angle in the circumferential direction.   5. The magnetic recording / reproducing apparatus according to claim 3, wherein the first format is a DDS format.

Images